function Hv = H(alpha, beta)


%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
k=[cos(alpha)*cos(beta);
cos(alpha)*sin(beta);
sin(alpha)];

r{1}=[0 0 0];
r{2}=[1/2 0 0];
r{3}=[1/4 -sqrt(3)/4 0];
r{4}=[-1/4 -sqrt(3)/4 0];
r{5}=[-1/2 0 0];
r{6}=[-1/4 sqrt(3)/4 0];
r{7}=[1/4 sqrt(3)/4 0];

phi=nan(7,1);

for i=1:7
    phi(i)=2*pi*r{i}*k;
end

Hv=exp(1i*phi);
end


